| 摘要 |
PURPOSE:To prevent use of a forged card by writing dummy information to card recording contents, eliminating the dummy information on a card reading or an information reproducing, and practicing in a normal condition. CONSTITUTION:Dummy information is recorded at the upper layer of the magnetic layer of magnetic card 30, true information is recorded downward, and the card is inserted from a card send-detaching port 12. After that, the card 30 is uptaken into a device, inversed at a U turn roller 23, and returned to a remove-detaching port 11. At the carrying route of the card 30, magnetic heads 51-55 are provided, a forgery preventing preprocessing is practiced at the head 53, and the information is read at the head 51. Next, the head 54 practices a writing to reproduce data after a card processing, writing information is confirmed at the head 52, and a forgery preventing processing is practiced at the head 55. Then, on a card reading, the heads 51-55 have a function to process to eliminate the dummy information on the information reproducing. Thus, the forgery of the card is prevented and the normal reading and writing of the information are attained. |
